The installation of a new 8.3km rising main between Stockwell and Truro has recently been completed. This forms part of the Truro Community Wastewater Management System (CWMS) that is currently under construction. HDS Australia designed and documented the system and is currently undertaking the project Superintendency.
The Truro CWMS project comprises the construction of a new wastewater collection system to service 102 properties. The project is being completed for the Mid Murray Council, but the collected wastewater will be treated at the existing Stockwell treatment plant which is owned and operated by the Barossa Council.
One new pump station will be installed to pump wastewater through the new 8.3km rising main to the Stockwell treatment plant. The new rising main travels along the old Truro-Stockwell railway line reserve for most of its route, although some sections pass through private farmland. The rising main was installed using under boring for sections where it passes beneath private property and for various creek crossings. Excavation of some of the trenched sections involved the use of a large rock saw (pictured).
Construction is expected to be completed in September 2015. HDS Australia’s Deshitha Senanayake will be continuing to act as the Superintendent’s Representative on site. The on-site role includes undertaking level checks for the gravity main, ensuring compliance with design plans and supervising pressure tests, as well as the management of any engineering issues which arise on site.
In addition to the unique cross Council wastewater treatment agreement, the project team has addressed a number of technical challenges. One of these has been the excavation in areas close to a significant fibre optic cable connecting Melbourne and Adelaide. Excavation techniques were modified in close consultation with the cable owner to ensure that disruption risks were minimised.
The next key stages of the project will be the commissioning of the rising main system and installation of the residential property connections.